This preliminary study analizes the diversity of the lithic artefact assemblages from two areas excavated at the Cerro de los Indios I site (C/I - Lago Posadas, Santa Cruz). Diversity is analized from a quantitative perspective, measuring two of the components: richness and homogeneity. The impact of sample size on richness is also taken into account. The aim is to generate information that will allow, in the future, to compare the assemblage diversity of C/I with others recorded in neighbouring as well as the same research areas, regardless of the size difference int he assemblages. This, in turn, will allow to evaluate the settlement systemfrom a regional perspective, as well as the role of Cerro de los Indios I within the región